steve brown live in chicago. i guess one of the challenges for police has got to be not knowing how many people will show up to protest, huh, steve? >> reporter: if you take a look at social mead like 2008er and facebook people are making their way here on a bus with other folks. nobody knows how much chaos there might be. we know there will be a lot of folks in town. we've seen peaceful protests and other kinds. let's start with the peaceful ones. they're going on throughout the week and planned throughout monday, and nato meeting which is held on sunday and monday. we also had some disorderly protests. one notably tuesday night in the chicago section of the city, south of here called bridgeport. now, police here, say that they are prepared for this and they have been preparing for months. >> in this case here in chicago we have chicago police department working in location -- in collaboration with the secret service coming up with this plan. they have been doing this over a year now and the city is well-prepare